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Logamatic R2107 blowing internal fuse
edited March 2022 in Oil Heating
Logamatic R2107 blew the internal 0.4A fuse. Installed a new one, the R2107 came on, I set the time, showed boiler temp, hot water and outside temp. Everything working fine, yet 15min later it blew the fuse again. In manual mode the burner fires and works. Thoughts?
Well it's obviously either an internal short or something else is shorting out somewhere else in the system. Time to be a detective.
I'd use a Short-Pro Tool or equivalent in place of the fuse, and turn it back on and start your troubleshooting.
Manual mode makes me think something more related to low voltage wiring.
There was an error rendering this rich post.0
Thanks. Since the sensors: hot water, outside temp, boiler temp where shown on the display, was thinking it is not a short in these.0
Sensors are ohm readings, not able to blow fuses. I vote it’s a line voltage issue. Did a pump kick on and blow the fuse? Popper Fuse is my go to in these situationsGary Wilson
Wilson Services, Inc
Does anyone know the correct resistance across the low voltage connects 1 and 2 for blue FA (outdoor sensor). Mine is 35.27K ohms without any wires connected (so no sensor connected). I tried Buderus technical support and they were not able to provide an answer.0
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